Abstract: A rotary wheel cap includes a fixed base fixed to a center of a wheel, a rotary cover axially mounted onto the fixed base, and an elastic member installed between the fixed base and rotary cover. When the wheel rotates, the rotary cover compresses the elastic member to a first position to form a positioning relationship with the fixed base, such that the rotary cover is rotated with the wheel and fixed base at the first position. When the wheel is still, the rotary cover is supported by the elastic member at a second position to release the positioning relationship with the fixed base. The rotary cover is rotated axially with respect to the fixed base by gravitation of a weight balancing portion at the second position. A design pattern on the rotary cover is aligned correctly by the axial rotation of the rotary cover when the wheel is still.

Abstract: A rotary wheel cap includes a fixed base fixed to a center of a wheel, a rotary cover axially mounted onto the fixed base, and an elastic member installed between the fixed base and rotary cover. When the wheel rotates, the rotary cover compresses the elastic member to a first position to form a positioning relationship with the fixed base, such that the rotary cover is rotated with the wheel and fixed base at the first position. When the wheel is still, the rotary cover is supported by the elastic member at a second position to release the positioning relationship with the fixed base. The rotary cover is rotated axially with respect to the fixed base by gravitation of a weight balancing portion at the second position. A design pattern on the rotary cover is aligned correctly by the axial rotation of the rotary cover when the wheel is still.

Abstract: A composite cubical maze puzzle. The puzzle includes a transparent cubical casing constructed by six pieces of transparent square face plate which has four tubular latch sections at four edges to engage respectively with a pain for fastening to a neighboring face plate. Base frames which have respectively wedged slots formed therein are provided in the casing for holding transparent and vertical intersecting partitions and horizontal plane partitions in an alternate stacking fashion. The partitions have pre-formed and removable circular plates which may be selectively removed to form apertures on the partitions. Annular and translucent colored stickers may be provided to adhere tot he partitions around the apertures. The apertures may be arranged to form a complete tortuous maze path for a ball to travel therein thus forming an intelligence benefitting maze puzzle.